Resin-recovering process



H. SIMPSON.

RESIN aEcovERme PRocEss.

APPLICATION FILED MAR. 25. |919.

Patented July 8, 1919.

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Nfl'orzz @y Wlbzwesf ROBERT SIMPSON, OF CINCINNATI, OHIO.

RESIN-RECOVERING PROCESS.

Specification of Letters Patent.

Patented July 8, 1919.

Application led March 25, 1919. Serial No. 284,900.

To all whom it may concern.'

Be it known that I, ROBERT SIMPSON, a citizen of the United States, residing at Cincinnati, Hamilton county, Ohio, have invented certain new and useful Improvements in Resin-Recovering Processes, of which the following is a specification.

In the distillation of turpentine it often happens that there lare large quantities of chips charged into retorts along with the turpentine, these chips being later withdrawn and thrown into the spoil heap. These chips carry quantities of resin which it is the object of-my process to recover. It also happens that iny burning out the weeds, etc., of a pine forest, which is done annually, the bark of the trees in places becomes fired and charred, and when the trees are chipped the catching vessels are apt to contain not only chips but charred bark and sand and other impurities which have been blown into the catching vessels, all of this Inatterrbeing charged into the stills along with the resin and later removed from the stills and gen# enally thrown into the spoil heap. Again, the distilled products from the still are usually strained through various strainers, generally of cotton batting. This cotton batting generally goes to the spoil heap but it contains a considerable quantity of resin. My improved process provides for the recovery of the resin, not only from the chips withdrawn from the stills, but also from the other impurities strained out from the stills and fromthe cotton batting employed in the straining operations.

In executing my improved resin-recovering process, I place a mass of the chips, etc., on a sloping floor to the under side of which sufficient heat is applied to keep the floor warm enough to maintain the recovered resin in a liquid condition, without danger of its burn-ing, so that it may run down the floor and be withdrawn. I then set ire to some exterior spot of the mass of chips, etc.

- at a point distant from the lowest portion o said floor, In first setting fire to the mass of chips, etc., there is, at the start, a little burning of the resin, productlve of black smoke,

but the heat due to the progressive burning of the chips quickly causes the liquefaction of the resin from the chips, etc., which percolates from the chips and through the mass of chips and to the floor, the heat of the 65 burning chips being sulicent, as the Vfire two spaces 5 proceeds progressively, to melt all of the resin. The preliminary burning of resin shortly ceases, whereupon the process continues until all of the resin has melted and flowed down the sloping floor, the wood of the chips burning to an ash4 to be later removed to permit the re-charging of the fu-rnace. The resin is mainly superficial to the chips land their impurities and it is the burnlng of these chips and these impurities and the heat sent into the mass ahead of them that causes the liquefaction of the resin eX- cept, `as before stated, at thc start of the process where there is a preliminary burning of the resin which ceases when the resin begins to freely percolate downwardly from the chips. During the operation of the furnace it is important that air be not admitted to the bottom of the mass through-the outlet. This is accomplished -by temporarily stopping up the outlet, until it is sealed by the flowing liquid resin.

An exemplifying apparatus which may be employed in the execution of my improved process is illustrated in the accompanying drawing in which Figure 1 is a horizontal section of a suitable furnace, the section being taken in the plane of line b and c of Fig. 2; and

Fig. 2 a vertical section of the furnace in the plane of line a of Fig. 1.

In the drawing l, indicates an open-topped furnace:

2, a sloping metallic floor therefrom:

3, upturned flanges of the floor causing the floor to form la metallic pany:

4, a longitudinal bric ge-wall supporting the intermediate portion of the width of the p-an and projecting toward but not entirely to the back wall of the furnace:

5, spaces below the floor, at each sideof the bridge-wall, these spaces forming ireplaces:

6, a smoke-flue communicating with the 7, an outlet-p-ipe leading from the lower end of the floor:

8, doors serving to close the front of the spaces 5:

' 9, a cover, which may, if desired, be placed as a roof over the furnace, this cover, if present, being removable:

10, a mass of the chips, etc., resting on the sloping floor and being dealt with: and

l1, fires disposed in spaces 5.

liquefied by the advancingl heat of the burning of the chipsthemselves.

I claim The improved resin-recovering process consistingI in supporting a mass of resinbearing chips, etc., in an open fireplace having a slop-ing floor, applying heat to the under surface of the supporting floor, igniting il an exposed surface of the mass of chips, etc., at a distance from the lowest portion of said floor, excluding air from the bottom of the 20 mass-ggf chips, and causing the progressive burning of the chips to melt their resin and cause the resin to percolate downwardly through the mass of chips, and removing the melted resin, substantially as set forth.

'ROBERT SIMPSON.

Witnesses J. J. KNIGHT,

REASON HENDERSON. 

